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CE525 pilot encounters problems communicating via O2 microphone when diverting to a nearby airport due to an engine failure that induced smoke into the aircraft.
| Attributes | |
| ACN | 794463 |
| Time | |
| Date | 200807 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 18000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc |
| Operator | common carrier : charter |
| Make Model Name | Citationjet C525/C526 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : charter |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer pilot : cfi |
| Experience | flight time last 90 days : 150 flight time total : 18000 flight time type : 1100 |
| ASRS Report | 794463 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : diverted to another airport flight crew : declared emergency flight crew : overcame equipment problem |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Environmental Factor Aircraft |
| Primary Problem | Environmental Factor |
Narrative:
Smoke (light) in cabin; donned oxygen mask; engine (left) side quit with loud popping sound. RPM rolling back; oil pressure; going to zero. Ran checklist; shut down engine; smoke cleared; divert to ZZZ; normal single-engine ILS and landing; fire chief inspected engine and aircraft; cleared us to taxi to FBO. Evidence of oil under engine and in exhaust (tailpipe) -- initial problem communicating with first officer and ATC. Smoke appeared about 30 seconds to 1 min before it was evident that there was a problem with the left engine. Donned oxygen mask and selected microphone/oxygen mask on the microphone select switch. However; I forgot mentally that the audio select panel must be selected to speaker on and vox off. That is the only way that 1) I could hear ATC and 2) it stopped the breathing sound in the speaker (must then use the interphone select switch on the control yoke). In a real smoke situation it is important that you know what needs to be done to communicate when you put the oxygen mask on.
Original NASA ASRS Text
Title: CE525 PLT ENCOUNTERS PROBLEMS COMMUNICATING VIA O2 MICROPHONE WHEN DIVERTING TO A NEARBY ARPT DUE TO AN ENGINE FAILURE THAT INDUCED SMOKE INTO THE ACFT.
Narrative: SMOKE (LIGHT) IN CABIN; DONNED OXYGEN MASK; ENG (L) SIDE QUIT WITH LOUD POPPING SOUND. RPM ROLLING BACK; OIL PRESSURE; GOING TO ZERO. RAN CHKLIST; SHUT DOWN ENG; SMOKE CLRED; DIVERT TO ZZZ; NORMAL SINGLE-ENG ILS AND LNDG; FIRE CHIEF INSPECTED ENG AND ACFT; CLRED US TO TAXI TO FBO. EVIDENCE OF OIL UNDER ENG AND IN EXHAUST (TAILPIPE) -- INITIAL PROB COMMUNICATING WITH FO AND ATC. SMOKE APPEARED ABOUT 30 SECONDS TO 1 MIN BEFORE IT WAS EVIDENT THAT THERE WAS A PROB WITH THE L ENG. DONNED OXYGEN MASK AND SELECTED MIKE/OXYGEN MASK ON THE MIKE SELECT SWITCH. HOWEVER; I FORGOT MENTALLY THAT THE AUDIO SELECT PANEL MUST BE SELECTED TO SPEAKER ON AND VOX OFF. THAT IS THE ONLY WAY THAT 1) I COULD HEAR ATC AND 2) IT STOPPED THE BREATHING SOUND IN THE SPEAKER (MUST THEN USE THE INTERPHONE SELECT SWITCH ON THE CTL YOKE). IN A REAL SMOKE SITUATION IT IS IMPORTANT THAT YOU KNOW WHAT NEEDS TO BE DONE TO COMMUNICATE WHEN YOU PUT THE OXYGEN MASK ON.
Data retrieved from NASA's ASRS site as of May 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.